A unified formula for light-adapted pupil size | Zendy

Andrew B. Watson | Zendy; John I. Yellott | Zendy

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A unified formula for light-adapted pupil size

Author(s) -

Andrew B. Watson,

John I. Yellott

Publication year - 2012

Publication title -

journal of vision

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.126

H-Index - 113

ISSN - 1534-7362

DOI - 10.1167/12.10.12

Subject(s) - luminance , pupil size , observer (physics) , pupil , computer science , field size , software , visual field , function (biology) , mathematics , optics , artificial intelligence , physics , programming language , quantum mechanics , evolutionary biology , imaging phantom , biology

The size of the pupil has a large effect on visual function, and pupil size depends mainly on the adapting luminance, modulated by other factors. Over the last century, a number of formulas have been proposed to describe this dependence. Here we review seven published formulas and develop a new unified formula that incorporates the effects of luminance, size of the adapting field, age of the observer, and whether one or both eyes are adapted. We provide interactive demonstrations and software implementations of the unified formula.

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